# Alliances and pacts: the security blocs, spending floors, and technology compacts that bind the world's major powers
> Formal defence alliances and technology pacts across NATO, AUKUS, the Quad, the SCO and the CSTO, and the spending commitments that determine whether guarantees hold.

**Meta:** type: reference · date: 2026-07-03 · heads:  · 4 takes · 2 lenses · 2 regions

## What it is

The alliances-and-pacts beat tracks formal security guarantees, technology-sharing compacts, and the spending commitments that make them credible. Every security alliance is also a burden-sharing negotiation: who fights, who pays, who transfers technology, and on what terms. The beat spans two worlds. The Western architecture centres on NATO (32 members), AUKUS (Australia, the UK, and the US), and the Quad (the US, Japan, Australia, and India), all oriented against Chinese military expansion and, in the European theatre, Russia. The non-Western arc runs through China's SCO (10 members) and Russia's CSTO (6 members).

## History

The North Atlantic Treaty, signed in Washington D.C. on April 4, 1949, created NATO as a collective-defence counterweight to Soviet power in Europe. A parallel US-Asian architecture assembled through bilateral treaties in the early 1950s, covering Japan, South Korea, Australia, and New Zealand. The Soviet Warsaw Pact dissolved in 1991; Russia built the CSTO in 1992 (formalised 2002) from former Soviet republics. China and Russia founded the Shanghai Five in 1996, expanded it into the SCO in 2001; Iran joined in 2023 and Belarus in 2024, bringing membership to 10.

Technology-sharing compacts came later. AUKUS launched in September 2021, transferring nuclear-propulsion submarine technology to Australia and cancelling Australia's A$90 billion contract with France's Naval Group. The Quad, first convened in 2004 after the Indian Ocean tsunami, became a leaders-level forum in 2021 with no treaty obligation, focusing on vaccine supply, infrastructure, and technology standards. Russia's invasion of Ukraine in February 2022 drove the burden-sharing reckoning: at the June 2025 Hague Summit, 31 of 32 NATO members pledged 5 percent of GDP in combined defence and security spending by 2035.

## Current state

As of July 2026, the NATO agenda is dominated by the July 7-8 Ankara summit, [the first ever held in Turkey](/zh/n/nato-ankara-summit-jul2-preview), convening after a US-led war against Iran in which European allies contributed no combat forces. [Italy has blocked summit declaration language](/zh/n/italy-nato-ukraine-2027-aid-block) committing allies to Ukraine aid beyond 2026, leaving a key paragraph in brackets. Russia closed all rail crossings with Finland, Estonia, and Latvia without explanation on July 1, tracked in [俄罗斯无故暂停与芬兰、爱沙尼亚及拉脱维亚的全部铁路口岸](/zh/n/russia-nato-rail-closure-jul1). The United Kingdom committed £298 billion over four years per [英国承诺十年内投入3000亿英镑国防费，目标2030年达到GDP的3%](/zh/n/uk-defence-investment-jun30), on course to become Europe's largest per-capita military spender by 2028.

The EU's Security Action for Europe (SAFE) instrument, adopted by the EU Council in May 2025, provides EUR 150 billion in EU-backed loans for joint defence procurement. Turkey's access to SAFE is a live condition in the Ankara summit negotiations, as documented in [北约峰会前夕欧盟三位专员首次同时降临安卡拉](/zh/n/eu-kallas-ankara-jun29).

In the Indo-Pacific, AUKUS settled in May 2026 on three in-service Block IV Virginia-class submarines as Australia's near-term acquisition. China has framed AUKUS and Australian Pacific diplomacy as coordinated containment, as shown in [中国指责澳大利亚'玩弄地缘政治'，回应纳卡马尔协议排除外国军事基地条款](/zh/n/china-vanuatu-australia-reaction-jun30).

## Relationships

NATO and defence-spending-surge are inseparable: the Hague Summit's 3.5%/1.5% GDP split is how the alliance quantifies member obligations. EU strategic autonomy sits adjacent to NATO but carries tension; SAFE loans can reinforce alliance capabilities or be read in Washington as substitution. Turkey is where these structures visibly collide, with Ankara's summit cooperation conditioned on SAFE fund access.

AUKUS and the Quad overlap in Australian membership and share the premise of countering Chinese military expansion, but differ in legal character. The Quad has no treaty obligation; AUKUS binds three governments to a technology-transfer pipeline estimated at A$368 billion through the mid-2050s. US bilateral pacts with Japan, South Korea, and the Philippines run parallel to every multilateral structure above.

The SCO and CSTO overlap through Chinese and Russian co-membership but serve different functions: the SCO is a dialogue and economic organisation; the CSTO is a mutual-defence treaty weakened since Armenia suspended active participation in 2023 following the Nagorno-Karabakh war.

## What to watch

- Whether the NATO Ankara summit produces agreed Ukraine aid language through 2027, or delivers the alliance's first unresolved declaration on an active European security crisis.
- Turkey's SAFE access conditions, which could set a precedent for how non-EU NATO allies engage EU defence industrial structures.
- Virginia-class submarine delivery timelines under AUKUS, constrained by US Navy production running below two hulls per year.
- CSTO's operational credibility following Armenia's suspension and Belarus's deepening absorption into Russian force structures.

## Regional takes (batched by bias / lens)

### statistical record
- **SIPRI** (International, en) — SIPRI April 2026 fact sheet on 2025 global military expenditure: world spending reached US$2,887 billion, the 11th consecutive annual increase, with European and Asian surges offsetting a US decline.
  Source: https://www.sipri.org/publications/2026/sipri-fact-sheets/trends-world-military-expenditure-2025

### official record
- **NATO** (International, en) — Official NATO topic page documenting the 2025 Hague Summit commitment: all 32 members except Spain pledged to reach 5% of GDP by 2035, split as at least 3.5% for core defence and up to 1.5% for broader security-related investment.
  Source: https://www.nato.int/en/what-we-do/introduction-to-nato/defence-expenditures-and-natos-5-commitment
- **Council of the EU** (Europe, en) — Council of the EU press release from 27 May 2025 announcing adoption of the Security Action for Europe (SAFE) instrument, providing up to EUR 150 billion in EU-backed loans for joint defence procurement among member states.
  Source: https://www.consilium.europa.eu/en/press/press-releases/2025/05/27/safe-council-adopts-150-billion-boost-for-joint-procurement-on-european-security-and-defence/
- **Shanghai Cooperation Organisation** (International, en) — Official SCO website documenting its 10 member states, observer states, and dialogue partners, and the outcomes of the September 2025 Tianjin summit.
  Source: https://eng.sectsco.org/

## Across the graph
- Related: [[nato-ankara-summit-jul2-preview]], [[italy-nato-ukraine-2027-aid-block]], [[uk-defence-investment-jun30]], [[eu-kallas-ankara-jun29]], [[china-vanuatu-australia-reaction-jun30]], [[russia-nato-rail-closure-jul1]]
- Entities: NATO Alliance, Aukus, The Quad, Sco Bloc, Csto Bloc, Defence Spending Surge, Bilateral Defence Pacts, EU Strategic Autonomy

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Canonical: https://rbtfl.xyz/zh/n/defence-industry-alliances-pacts-backgrounder